Merge pull request #1070 from olso/patch-1

Update free-programming-books.md

free-programming-books.md

@@ -1358,7 +1358,6 @@ See also [TeX](#tex)
 * [PHP Programming](http://en.wikibooks.org/wiki/PHP_Programming)
 * [PHP Security Guide](http://phpsec.org/projects/guide/)
 * [PHP: The Right Way](http://www.phptherightway.com/)
-* [PHP with Guru99](http://www.smashwords.com/books/view/324888)
 * [Practical PHP Programming](http://www.tuxradar.com/practicalphp) (wiki containing O'Reilly's *PHP In a Nutshell*)
 * [Practical PHP Testing](http://www.giorgiosironi.com/2009/12/practical-php-testing-is-here.html)
 * [Symfony2](http://symfony.com/doc/current/book/index.html)